kjellpk/fit.models: Compare Fitted Models

Version 0.5-14

The fit.models function and its associated methods (coefficients,
print, summary, plot, etc.) were originally provided in the robust package to
compare robustly and classically fitted model objects. The aim of the fit.models
package is to separate this fitted model object comparison functionality from
the robust package and to extend it to support fitting methods (e.g., classical,
robust, Bayesian, regularized, etc.) more generally.